The government has threatened to halt subsidies for new offshore wind farms over the next four years unless the industry can slash the cost of new projects.Announcing details of the government’s energy policy “reset” this morning, Energy and Climate Change Secretary Amber Rudd said her department would run three auctions over the course of this parliament that would allow low carbon technologies to compete for price support contracts. However, she warned there would be “no more blank cheques” for offshore wind farms, and that future auctions would depend on developers cutting costs. “Further support will be strictly conditional on the cost reductions we have seen already accelerating. The technology needs to move quickly to cost competitiveness,” she said.